INSECTA MADERENSIA. 109 



A. smaller than the A. umbricola, and more oblong (being neither so wide in front nor so acuminated 

 behind), and, likewise, of a deeper black ; a little more coarsely punctured and shining, but not 

 nearly so pubescent. Prothurax large, but not so greatly developed as that of the last species, 

 and only slightly exceeding, behind, the base of the elytra in breadth ; convex, and concolorous 

 with the rest of the surface ; with its posterior angles produced, but not so much so as those of 

 the A. umbricola, and apparently not at all flavescent, though the extreme basal edge in that par- 

 ticular region is just perceptibly paler. Elytra with their hinder margin a little paler. An- 

 tenncE shorter and darker than those of the last species, being infuscate. Legs testaceous. 



I can perceive no real distinctions between the present AcratricMs and the 

 common European A. fasclciilaris ; though it is due to my friend M. Motschulsky 

 to state that he was able to detect some minute difference (unappreciable by myself) 

 sufficient, as he supposed, to separate it from that iusect, — and hence the specific 

 title of brevicornis was proposed for it by him. An accurate measurement how- 

 ever will show that its antennse are not in reality shorter than those of the ordi- 

 nary A. fascicularis ; and, rather therefore than incur the risk of multiplying 

 names unnecessarily in these microscopic tribes, I prefer ascribing it to that 

 species, especially since I cannot, myself, discover any characters important enough 

 to warrant its removal from it. 



87. AcratricMs pumila. 

 A. ovato-oblonga pubescens nigra subnitida, prothorace elytrorum latitudine subsequali, angulis 



posticis leviter productis, antennis fusco-piceis, pedibus testaceis. 

 Long. Corp. lin. ^-|. 



Ftiliwm sericans, Schupp. in litt, 



Trichopteryx sericans, G-illm. in Sturm, Deutsch. Fna, xvii. 52 {nee Heer, 1841) (1845). 



pumila, Erich. Nat. der Ins. DeutscTi. iii. 22 (1848). 



Acratricliis fumila. Mots. Hull, de la Soc. Imp. de il/bscoi«, xxi. 568 (1848). 



Habitat Maderam, et borealem et australem, ad radices graminum vel sub foliis arborum marcidis, 

 infra 3000' s. m. ubique vulgaris. 



A. the smallest of the three species, and more oblong than either of the others, being of almost equal 

 breadth before and behind, — though, if anything, rather more expanded posteriorly than in front ; 

 deep black; rather distinctly punctured and pubescent, but not quite so shining as the A. fas- 

 cicularis. Prothorax less developed than in either of the other species, being scarcely perceptibly 

 broader behind than the base of the elytra ; less convex than in either of the other species ; and 

 entirely concolorous with the rest of the surface ; and with its posterior angles very much less 

 produced. Elytra with their hinder margin a little paler. Antenna and legs as in the A. fasci- 

 cularis ; except that the former are a little more darkly infuscated, or picescent, and have their 

 apical joint rather more acuminated. 



The smallest of the Madeiran FtiUadce ; and I believe I do not err in referring 

 it to the A. ]}umila of Erichson. It may be readily kno-mi from the other two 

 species of the present genus by its more oljlong and narrower outline, and by its 



